<%= start_form_tag :action => "signin" %>
<table>
  <tr>
    <td align="right"><label for="username">Username:</label></td>
    <td><%= text_field_tag "username" %></td>
  </tr>
  <tr>
    <td align="right"><label for="password">Password:</label></td>
    <td><%= password_field_tag "password" %></td>
  </tr>
  <tr>
    <td></td>
    <td><%= submit_tag "Sign in" %></td>
  </tr>
</table>
<%= end_form_tag %>